in with the new

test/core/utils.js

@@ -0,0 +1,75 @@
+/* eslint-env mocha */
+import expect, { createSpy } from "expect"
+import { fromJS } from "immutable"
+import { mapToList } from "core/utils"
+
+describe("utils", function(){
+
+  describe("mapToList", function(){
+
+    it("should convert a map to a list, setting `key`", function(){
+      // With
+      const aMap = fromJS({
+        a: {
+          one: 1,
+        },
+        b: {
+          two: 2,
+        }
+      })
+
+      // When
+      const aList = mapToList(aMap, "someKey")
+
+      // Then
+      expect(aList.toJS()).toEqual([
+        { someKey: "a", one: 1 },
+        { someKey: "b", two: 2 },
+      ])
+    })
+
+    it("should flatten an arbitrarily deep map", function(){
+      // With
+      const aMap = fromJS({
+        a: {
+          one: {
+            alpha: true
+          }
+        },
+        b: {
+          two: {
+            bravo: true
+          },
+          three: {
+            charlie: true
+          }
+        }
+      })
+
+      // When
+      const aList = mapToList(aMap, ["levelA", "levelB"])
+
+      // Then
+      expect(aList.toJS()).toEqual([
+        { levelA: "a", levelB: "one", alpha: true },
+        { levelA: "b", levelB: "two", bravo: true },
+        { levelA: "b", levelB: "three", charlie: true },
+      ])
+
+    })
+
+    it("should handle an empty map", function(){
+      // With
+      const aMap = fromJS({})
+
+      // When
+      const aList = mapToList(aMap, ["levelA", "levelB"])
+
+      // Then
+      expect(aList.toJS()).toEqual([])
+
+    })
+
+  })
+
+})